Re: [PATCH v29 25/32] x86/cet/shstk: Handle thread shadow stack

Borislav Petkov
2021-08-26T17:27:59Z

On Thu, Aug 26, 2021 at 10:22:29AM -0700, H.J. Lu wrote:
> > > + /*
> > > + * Earlier clone() does not pass stack_size. Use RLIMIT_STACK and
> >
> > What is "earlier clone()"?
>
> clone() doesn't have stack size info which was added to clone3().

/me goes and reads the manpage...

clone3()
The clone3() system call provides a superset of the functionality of the older
clone() interface. It also provides a number of API improvements, including:
space for additional flags bits; cleaner separation in the use of various argu‐
ments; and the ability to specify the size of the child's stack area.

Aha, Yu-cheng, pls use those words to make your comment understandable.

Thx.

--
Regards/Gruss,
Boris.